Exciton Storage in a Nanoscale Aharonov-Bohm Ring with Electric Field Tuning

Journal Article · Fri Mar 06 00:00:00 EST 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.102.096405· OSTI ID:21180269

Fischer, Andrea M; Roemer, Rudolf A ^[1]; Campo, Jr, Vivaldo L ^[2]; Portnoi, Mikhail E ^[3]

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1. Department of Physics and Centre for Scientific Computing, University of Warwick, Coventry, CV4 7AL (United Kingdom)
2. Departmento de Fisica, Universidade Federal de Sao Carlos-UFSCar, 13565-905 Sao Carlos, SP (Brazil)
3. School of Physics, University of Exeter, Exeter EX4 4QL (United Kingdom)

We study analytically the optical properties of a simple model for an electron-hole pair on a ring subjected to perpendicular magnetic flux and in-plane electric field. We show how to tune this excitonic system from optically active to optically dark as a function of these external fields. Our results offer a simple mechanism for exciton storage and readout.

• OSTI ID: 21180269
• Journal Information: Physical Review Letters, Vol. 102, Issue 9; Other Information: DOI: 10.1103/PhysRevLett.102.096405; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AHARONOV-BOHM EFFECT
ELECTRIC FIELDS
EXCITONS
MAGNETIC FLUX
NANOSTRUCTURES
OPTICAL PROPERTIES
RINGS